Bio Lumbantoruan

Bio Lumbantoruan

System Architect

“There are no right answers in architecture — only tradeoffs.” — Mark Richards

Download Resume
vault-terminal ~
$ whoami
bio lumbantoruan — system.architect.v1.0
$ systemctl $(list-services)
Perfection is achieved not when there is nothing more to add, but when there is nothing left to take away.
— Antoine de Saint-Exupéry

Where I've made an impact

System Design & Architect

Srabutan.com

Jan 2026Present | Indonesia

  • Architected AI-powered matching system for freelance marketplace
  • Designed scalable microservices: portfolio management, real-time collaboration, secure payments
  • Led full-stack development with GitHub Actions, Docker, Railway
ReactVueJavaScriptTailwindDockerPythonRailway

Senior Web Developer

CITT Services

Jan 2014Dec 2025 | Dallas, USA

  • Delivered consulting for Pepperstone, TitanFX, BaxiaMarkets, Funded Prop BX, Traderscolo, Liquidity Connect
  • Built web apps with React, Vue, WordPress, Laravel, HubSpot CMS
  • Architected backend systems, automated data sync with n8n, Python, Flask
  • Docker deployment on DigitalOcean & Google Cloud
UbuntuReactPHPWordPressLaravelVueDockern8nPythonDigitalOcean

Host Integrator

Wirecard (PT. Aprisma Indonesia)

Aug 2011Dec 2013 | Jakarta, Indonesia

  • Engineered payment gateway integrations at Wirecard subsidiary
  • Connected Prisma Gateway with banking systems for 14,000+ corporate clients across 69 countries
  • PCI-DSS compliance across all payment implementations
JavaHTML5CSS3SpringSpring BootHibernate

What I've built

A selection of projects spanning fintech, e-commerce, and AI.

Toko Vavelle

Vietnam Coffee E-Commerce platform built with AstroJS, Tailwind, and SEO-optimized architecture. Features automated AI image generation pipeline for commercial product photography.

AstroJSTailwindSEOfal.aiNano Banana

Vavelle Crispy Pork Belly

E-commerce storefront for premium crispy pork belly products, featuring an automated AI image generation pipeline (fal.ai, Nano Banana) for commercial-quality product photography at scale.

AstroJSTailwindfal.aiNano BananaPython

Travel to Bali Paradise

Travel and booking platform for Bali tourism experiences with responsive design and booking integration.

AstroJSTailwind

CrosSyncOrder

Forex trade synchronization SaaS platform with real-time WebSocket communication, ZeroMQ messaging, and Kubernetes orchestration.

Node.jsExpressWebSocketZeroMQDockerK8s

BaxiaMarkets

Financial services platform delivering trading infrastructure with WordPress, Laravel, React, and Vue for a seamless client experience.

WordPressLaravelReactVue

Srabutan.com

Indonesia's next freelance marketplace — full-stack platform with AI-powered matching, real-time collaboration, and secure payments.

ReactVuePythonDocker

Damai Kasih Channel

Religious digital platform for community engagement and content distribution, built with Jekyll and vanilla JavaScript.

JekyllJavaScript

Vavelle AI Chat Interface

AI-powered chat application with real-time streaming responses using React, Tailwind, and Groq API integration.

ReactTailwindGroq

Sales Dashboard

AI-powered analytics dashboard with FastAPI backend, Next.js frontend, and Gemini AI for intelligent sales insights.

FastAPINext.jsGemini AI

Technologies I work with

A few things I’ve worked with…

Frontend

React
TypeScript
Vue
Astro
Tailwind
Next.js

Backend

Node.js
FastAPI
Express
NestJS
GraphQL
Python

Full-Stack

Next.js
Laravel
Java/Spring
PHP

Infrastructure

Docker
K8s
GitHub Actions
DigitalOcean
n8n
Redis

CMS

WordPress
HubSpot
Jekyll

Agentic AI

Hermes
OpenClaw
OpenWork

AI Image Generation

fal.ai
Nano Banana
Prompt Engineering

What people say

Feedback from colleagues and leaders I've worked with.

Bio consistently delivers exceptional technical solutions that drive real business value. His ability to architect complex systems while maintaining clean, maintainable code is rare. Over the years, he has been instrumental in delivering projects for our most demanding fintech clients.
NW

Nash Wadud

CEO, CITT Services

Thoughts on engineering

Writing about fintech, architecture, and the craft of software.

June 15, 2026
nodejsarchitecture+1

BullMQ vs Temporal for Node.js Production Workflows

BullMQ handles fire-and-forget jobs. Temporal handles crash-safe, stateful workflows. I picked the wrong one and it cost me a weekend. Here is how I choose.

> Read more
June 14, 2026
DatabasePostgreSQL+1

Database Indexing Strategy: Composite vs Covering vs Partial

Three index patterns dominate production query optimization: composite for multi-column filters, covering for index-only scans, partial for small subsets.

> Read more
June 14, 2026
AIAgents+2

Monitoring Autonomous Agents in Production

Uptime and error rate reveal nothing about agent health. Four metrics that matter, how to trace an agent's reasoning chain, and when to halt a run.

> Read more
June 13, 2026
FintechArchitecture+1

When Your Payment Provider Goes Down: Circuit Breakers in Production

How circuit breaker patterns prevent payment provider outages from cascading into system-wide failures, with per-provider configuration strategies and fallback patterns for fintech systems.

> Read more
June 13, 2026
JavaScriptFrontend+1

The JavaScript Console Methods You're Not Using

Beyond console.log: the console.table, console.time, console.group, console.trace, and console.count methods that cut debugging time in the browser.

> Read more
June 12, 2026
architecturebackend+1

Background Jobs at Scale: Why Exactly-Once Processing Is a Lie

Message brokers cannot guarantee exactly-once delivery. The correct response is idempotent processing with deduplication tables and conditional writes.

> Read more

Let's work together

Have a project in mind? Let's talk about how we can build it.

The best way to get a project done faster is to start sooner.
— Robert C. Martin (Uncle Bob)